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PROVISIONS - Rollforward (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Current    
Balance in the beginning $ 2,441 $ 2,448
Additions/(recoveries), Capital 5,892 3,470
Reclassifications 2,418 1,093
Decreases (8,605) (4,570)
Balance at the end 2,146 2,441
Non-current    
Balance in the beginning 11,263 9,511
Additions/(recoveries), Capital 2,608 4,487
Additions/(recoveries), Interest 1,635 1,382
Reclassifications (2,418) (1,093)
Decreases (3,514) (3,024)
Balance at the end 9,574 11,263
Total provisions    
Total provisions in the beginning 13,704 11,959
Additions/(recoveries), Capital 8,500 7,957
Additions/(recoveries), Interest 1,635 1,382
Decreases (12,119) (7,594)
Total provisions at the end 11,720 13,704
Other information    
Additions/(recoveries), Capital, charged to provisions (8,116) (4,549)
Additions/(recoveries), Capital, charged to other operating expenses 7,986 4,533
Additions/(recoveries), Capital, charged to rights of use assets 604 3,413
Additions/(recoveries), Capital, charged to other comprehensive income   11
Provision    
Current    
Balance in the beginning 2,441 2,448
Additions/(recoveries), Capital 5,892 3,470
Reclassifications 2,418 1,093
Decreases (8,605) (4,570)
Balance at the end 2,146 2,441
Non-current    
Balance in the beginning 6,762 8,211
Additions/(recoveries), Capital 2,004 1,074
Additions/(recoveries), Interest 1,435 1,014
Reclassifications (2,418) (1,093)
Decreases (1,673) (2,444)
Balance at the end 6,110 6,762
Asset retirement obligations    
Non-current    
Balance in the beginning 4,501 1,300
Additions/(recoveries), Capital 604 3,413
Additions/(recoveries), Interest 200 368
Decreases (1,841) (580)
Balance at the end $ 3,464 $ 4,501